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Tropical sunshine recorder Mk IIIA by Casella

1959

Assmann psychrometer by C. F. Casella

1919

Clockwork aspirated psychrometer

Polymeter, relative humidity meter

1950-1970

Hygrometer slide rule no T8563/1

1960-1970

Whirling psychrometer

1966

Piche evaporimeter by Casella

[1965]

Psychrometer by Casella

Sensitive' anemometer

1950

Portable 3-cup anemometer by Casella London

1963

Night sky camera by Casella

1939

Maximum and minimum thermometer by C.F.Casella

1908-1913

Sunshine Recorder for Tropical Latitudes by Casella, 1925

1925

Eclimeter, British, 1910-1950

1910-1950

Aspirated psychrometer by Casella

1930

C.F. Casella and Co. Ltd personal air quality sampler, 1971-1980

1971-1980

Clockwork aspirated psychrometer, Mk3

1971

Assmann psychrometer by Casella

1944

Frost point hygrometer

1951

Anderson's slide rule

Shielded Campbell-Stokes sunshine recorder Mk II

1952

Dial for Anemometer 'Meter No.3'

1940-1960

Visibility meter MkII by Casella London

1943

School rain gauge by C.F. Casella and Co. Ltd

1936

Bimetallic actinograph, M.O. Mark III, by Casella, 1955

1955

White & Bean's area scale on transparent celluloid

1907

Reeve's patent night marching watch

1916

3 cup sensitive anemometer by C.F. C (C.F. Casella and Co. Ltd)

1942

3 cup sensitive anemometer

1942

J.S. Dines' recording theodolite

1910-1920

Frost point hygrometer

1951

Stand and fan for hand-operated Assmann psychrometer

1952

Bennett-Casella visibility meter by C.F. Casella and Co. Ltd

1949

Owens Dust Counter

1960-1969

Case with 3 photothermograph scales

1957

Whirling psychrometer

1940-1945

C.F. Casella and Co. Ltd cascade type dust grader, 1961-1970

1961-1970

Run of wind anemometer by C.F. Casella

1940-1950
Revolution and Speed indicator, Mk. IV. Fitted to Casella Instrument Board

Revolution and Speed indicator

Discharge tube, by Casella, European, 1900-1925

Glass discharge tube

1900-1925
Bent-stem earth thermometer by C.F. Casella and Co. Ltd, c. 1925.

Bent-stem earth thermometer by C.F. Casella and Co. Ltd

1925
Template pricker, 1950-1970

Template pricker, 1950-1970

1950-1970
Earth thermometer, maximum and minimum, mercury and alcohol-in-glass, fahrenheit, tube bent 8 inches above bulb. Made by C.F. Casella and Co. Ltd, London. Marked MO 18203, 8974 and NPL25 certified in 1925. Min scale 20 to 125, max scale 15 to 100

Earth thermometer

Minimum thermometer, spirit-in-glass, sheathed, degrees absolute, by C F Casella & Co Ltd, London. Marked MO5, KO with handwritten label "Constantly getting out of order Jan 26/17" . Scale 240 to 310. Dated 1917

Minimum thermometer

1917
Frame for whirling psychrometer, by Casella, London. Used by Home Office Scientific Advisory Branch.

Frame for whirling psychrometer

1920-1940
Three packets of hygrometer wicks, T8568/2, T8750/1, T6420/1, C 1966

Three packets of hygrometer wicks

[1966]
5-inch transit theodolite by Casella, 1924, complete, in two fitted boxes: (base) 36 x 26 x 24cm, (optics) 30 x 22 x 23cm

5-inch transit theodolite by Casella

1924
Spirit level by C.F. Casella and Co. Ltd., London, with Mahogany box and leather case no. 8314, early 20th century

Spirit level by C.F. Casella and Co. Ltd.

Selection of components from the three prism Oxford Solar Spectroscope made by Casella Limited with optical components from Adam Hilger Ltd. for the University Observatory, Oxford in 1938. Parts include two large 60 ยบ prisms, one prism stand and the collimator objective lens.

Selection of components from the three prism Oxford Solar Spectroscope made by Casella Limited

1938
Electric cup anemometer and portable receiver, 1924, M.O. pattern.

Electric cup anemometer and portable receiver

1924